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2-d mesh-based motion estimation and video object manipulation
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index.pdf
Date
2007
Author
Kaval, Hüseyin
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Motion estimation and compensation plays an important role in video processing applications. Two-dimensional block-based and mesh-based models are widely used in this area. A 2-D mesh-based model provides a better representation of complex real world motion than a block-based model. Mesh-based motion estimation algorithms are employed in both frame-based and object-based video compression and coding. A hierarchical mesh-based algorithm is applied to improve the motion field generated by a single-layer algorithm. 2-D mesh-based models also enable the manipulation of video objects which is included in the MPEG-4 standard. A video object in a video clip can be replaced by another object by the use of a dynamic mesh structure. In this thesis, a comparative analysis of 2-D block-based and mesh-based motion estimation algorithms in both frame-based and object-based video representations is performed. The experimental results indicate that a mesh-based algorithm produces better motion compensation results than a block-based algorithm. Moreover, a two-layer mesh-based algorithm shows improvement over a one-layer mesh-based algorithm. The application of mesh-based motion estimation and compensation to video object replacement and animation is also performed.
Subject Keywords
Computer Engineering
,
Computer Hardware
URI
http://etd.lib.metu.edu.tr/upload/2/12608869/index.pdf
https://hdl.handle.net/11511/17098
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Graduate School of Natural and Applied Sciences, Thesis
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H. Kaval, “2-d mesh-based motion estimation and video object manipulation,” M.S. - Master of Science, Middle East Technical University, 2007.
